Heater for an automotive vehicle and method of forming same

• US 7,205,510 B2
• Filed: 03/21/2005
• Issued: 04/17/2007
• Est. Priority Date: 03/22/2004
• Status: Active Grant

• Current Assignee: Gentherm GmbH (Gentherm Incorporated)
• Original Assignee: WET Automotive Systems Limited (Gentherm Incorporated)
• Inventors: Howick, Shaun
• Primary Examiner(s): Evans; Robin
• Assistant Examiner(s): PATEL, VINOD D
• Application Number:
  US11/085,644
• Publication Number:
  US 20050242081A1
• Time in Patent Office: 757 Days
• Field of Search: 219/529, 219/543, 219/545, 219/217, 219/219, 219/528, 219/549, 297/180.12
• US Class Current: 219/529
• CPC Class Codes: B60N 2/5685 Resistance
• CPC Class Codes: H05B 2203/003 using serpentine layout
• CPC Class Codes: H05B 2203/004 using zigzag layout
• CPC Class Codes: H05B 2203/013 Heaters using resistive films or coatings
• CPC Class Codes: H05B 2203/026 Heaters specially adapted for floor heating
• CPC Class Codes: H05B 2203/029 Heaters specially adapted for seat warmers
• CPC Class Codes: H05B 3/34 flexible, e.g. heating nets or webs

Abstract

There is disclosed a heater for an automotive vehicle or other article of manufacture. The heater typically includes a first conductive medium and a second conductive medium disposed upon a carrier. In a preferred embodiment, the first conductive medium includes a first section and a second section that are electrically connected by a second conductive medium. The second conductive medium preferably exhibits a positive thermal coefficient.

Claims

1. An article of manufacture, comprising:

a carrier of the article of manufacture, the carrier having a surface;

a heater overlaying the surface, the heater including;

i) a flexible carrier;

ii) a first conductive medium disposed upon the carrier wherein the first conductive medium includes a negative section having a plurality of first extensions and a positive section having a plurality of second extensions; and

iii) a second conductive medium electrically connecting the positive section with the negative section;

wherein a plurality of openings extend through the heater;

wherein the plurality of openings is divided into a plurality of sets of openings; and

wherein the flexible carrier includes a plurality of strips of uncovered surface area and each of the strips of uncovered surface area is located between at least one of the first extensions and at least one of the second extensions and each of the strips of uncovered surface area includes one or more of the sets of openings extending therethrough.

2. An article of manufacture as in claim 1 wherein the second conductive medium includes a plurality of strips, each of the strips in overlapping relation with one of the plurality of first extensions and one of the plurality of second extensions, the plurality of strips also extending substantially parallel to the first and second extensions.

3. An article of manufacture as in claim 1 wherein the openings are slits that extend through the flexible carrier.

4. An article of manufacture as in claim 1 wherein at least one of the flexible carrier, the first conductive medium and second medium are formed of a polymeric material.

5. An article of manufacture as in claim 1 wherein the carrier of the article of manufacture is a portion of a seat of an automotive vehicle.

6. An article of manufacture as in claim 1 wherein the flexible carrier includes a plurality of strips of covered surface area between the strips of uncovered surface area wherein the strips of covered surface area are covered by the second conductive medium.

7. An article of manufacture as in claim 6 wherein each of the strips of covered surface area includes one or more of the sets of openings extending therethrough.

8. An article of manufacture as in claim 7 wherein the plurality of sets of openings includes at least 4 sets of openings and in each set of openings includes at least 4 openings an article of manufacture wherein the plurality of openings includes at least 10 openings.

9. An article of manufacture as in claim 1 wherein an air mover is provided to circulate air through the plurality of openings extended through the heater.

10. An article of manufacture as in claim 9 wherein the air mover is a blower.

11. An article of manufacture comprising:

a carrier of the article of manufacture, the carrier having a surface;

a heater assembly including a control element and a main heater disposed upon a flexible carrier, wherein;

i) the control element includes a first conductive medium formed of a PTC material; and

ii) the main heater include a first conductive material formed of an NTC or CTC material;

wherein electrical current flows through the control element to and through the main heater such that the control element controls the amount of electrical current flowing through the main heater; and

wherein the control element is a control heater that covers a surface area of the flexible carrier that is less than half of a surface area that is covered by the main heater.

12. An article of manufacture as in claim 11 wherein the surface area covered by the control heater is less than one quarter the surface area covered by the main heater.

13. An article of manufacture as in claim 11 wherein the main heater is located on a body portion of the flexible carrier and the control heater is locate on an extension of the flexible carrier.

14. An article of manufacture as in claim 11 wherein at least one of the NTC material, the PTC material and the flexible carrier are formed of a polymeric material.

15. An article of manufacture as in claim 11 wherein openings extend through the carrier and an air mover is provided to move air through the openings.

16. An article of manufacture as in claim 11 wherein the carrier of the article of manufacture is part of a seat of an automotive vehicle.

17. An article of manufacture, comprising:

a carrier of the article of manufacture, the carrier having a surface wherein the carrier of the article of manufacture is a portion of a seat of an automotive vehicle;

a heater overlaying the surface, the heater including;

i) a flexible carrier;

ii) a first conductive medium disposed upon the carrier wherein the first conductive medium includes a negative section having a plurality of first extensions and a positive section having a plurality of second extensions; and

iii) a second conductive medium electrically connecting the positive section with the negative section, wherein the second conductive medium includes a plurality of strips, each of the strips in overlapping relation with one of the plurality of first extensions and one of the plurality of second extensions, the plurality of strips also extending substantially parallel to the first and second extensions;

wherein

i) a plurality of openings extend through the heater;

ii) the plurality of openings is divided into a plurality of sets of openings; and

iii) the flexible carrier includes a plurality of strips of uncovered surface area and each of the strips of uncovered surface area is located between at least one of the first extensions and at least one of the second extensions and each of the strips of uncovered surface area includes one or more of the sets of openings extending therethrough.

18. An article of manufacture as in claim 17 wherein the openings extend through the flexible carrier only.

19. An article of manufacture as in claim 17 wherein the openings extend through the second conductive medium and the flexible carrier only.

20. An article as in claim 17 wherein:

i) the carrier of the heater and the first conductive medium cooperatively define at least one contour, which bends about a contour of the article;

ii) the carrier of the heater has an hour-glass shape;

iii) the second conductive medium is a PTC material;

iv) the carrier is formed of a material having an elongation at failure greater than 50%; and

v) the first and second conductive mediums are coated with a protective dielectric coating formed of a polymeric dielectric composition.

21. An article of manufacture as in claim 20 wherein the plurality of sets of openings includes at least 4 sets of openings and each set of openings includes at least 4 openings and wherein the plurality of openings includes at least 20 openings.

22. An article of manufacture as in claim 17 wherein the a sensor pad is integrated with the heater and the sensor pad is in signaling communication with the heater for assisting in activating the heater when an occupant is present in the vehicle seat and for deactivating the heater when an occupant is not present in the vehicle seat.